CN100441271C - Method and equipment for integrated stack gas desulfurization and dust removal of circulating fluid bed in damp dry type - Google Patents
Method and equipment for integrated stack gas desulfurization and dust removal of circulating fluid bed in damp dry type Download PDFInfo
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- CN100441271C CN100441271C CNB2004101018526A CN200410101852A CN100441271C CN 100441271 C CN100441271 C CN 100441271C CN B2004101018526 A CNB2004101018526 A CN B2004101018526A CN 200410101852 A CN200410101852 A CN 200410101852A CN 100441271 C CN100441271 C CN 100441271C
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Abstract
The present invention relates to an integrated method and a device for flue gas desulfurization and dust removal of a semi-dry type circulating fluidized bed, which belongs to the technical field of flue gas purification. The desulfurizing tower of the device of the present invention is formed by the connection of a straight barrel section and a conical cylinder section, wherein the bottom of the conical cylinder section is connected with a pre-separating chamber through a transition section, the bottom of the pre-separating chamber is provided with a conical bottom with an ash-falling port, and the bidirectional sides of the pre-separating chamber are provided with flue gas inlets with tangential rotating gas inlet modes; a multilayer slurry-spraying mechanism is arranged in the conical cylinder section; a first flue gas outlet connected with a bag type dust remover is arranged on the straight barrel section. A material-returning oblique groove is arranged on the oblique surface at the conical bottom the bag type dust remover, and the bottom end interface of the material-returning oblique groove is connected with the desulfurizing tower and is arranged under the lower-layer slurry-spraying mechanism; the upper part of the side surface of the bag type dust remover is provided with a second flue gas outlet. The present invention not only can effectively enhance the utilization rate of a desulfurizing agent and flue gas desulfurizing efficiency when ensuring dust removing efficiency, but also improve the flow field in the tower in a reasonable flue gas distributing mode so that the desulfurizing tower has the advantages of large flue gas treating capacity and good load adaptability.
Description
Technical field
The present invention relates to the flue gases purification field, relate in particular to the device that is applicable to the incorporate method of jumbo stack gas desulfurization and dust removal of circulating fluid bed in damp dry type and realizes this method.
Background technology
Flue gas ash removal is two emphasis aspects that control environment and pollute with removing sulfur dioxide.Along with country's more and more tight to environmental protection requirement, not only improved the discharge standard of flue dust, and strengthened control the discharging oxysulfide.But dust removal integrated technical application and technical limitation are clearly in the prior art.System's operational reliability of existing desulphurizing and dust-removing integral technology is relatively poor, and the coordinated operation of desulphurization system and dust pelletizing system is difficult to realize.These problems have seriously restricted the development of desulphurizing and dust-removing integral technology.For this reason, the applicant has applied for Chinese patent 02146757.9, and name is called " incorporate method of a kind of stack gas desulfurization and dust removal of circulating fluid bed and device thereof ".It can effectively improve the utilization rate and the smoke desulfurization efficiency of desulfurizing agent when guaranteeing efficiency of dust collection.But because large-scale coal fired power plant unit discharging exhaust gas volumn is big, and load variations is big, has caused inhomogeneities smooth in the major diameter desulfurizing tower, and the utilization of desulfurizing agent is affected, and makes this technology also only be applicable to the flue gas desulfurization of medium and small coal-fired unit.
Summary of the invention
At the problem of above-mentioned prior art situation and existence, technical problem to be solved by this invention provides incorporate method of a kind of stack gas desulfurization and dust removal of circulating fluid bed in damp dry type and device.It not only can effectively improve the utilization rate and the smoke desulfurization efficiency of desulfurizing agent when guaranteeing efficiency of dust collection, and by the rational flue gas method of salary distribution, improves flow field in tower, makes that its smoke treatment amount is big, load adaptability good.Be applicable to that big-and-middle-sized coal fired power plant unit uses.
In order to reach the foregoing invention purpose, technical scheme of the present invention realizes as follows:
The incorporate method of a kind of stack gas desulfurization and dust removal of circulating fluid bed in damp dry type, it comprises uses pre-separation chamber, desulfurizing tower and sack cleaner, the steps include:
1) be divided into two-way from the flue gas of boiler emission behind trunk line and enter the pre-separation chamber of desulfurizing tower bottom with two-way tangential rotation intake method, realize the pre-separation of flue gas buffering and flying dust, the fly ash granule after the separation is discharged through ash port.
2) flue gas enters the awl column body segment of desulfurizing tower by changeover portion, makes flue gas stream be evenly distributed at this awl column body segment, with the desulfurizing agent generation chemical reaction of the different flow that uses whitewashing mechanism to spray into according to thermograde in the desulfurizing tower, removes sulfur dioxide simultaneously.
3) circulation in unreacted desulfurizing agent and the flue gas of carrying fly ash granule secretly clash into, fall after rise and form in desulfurizing tower at the direct tube section top of desulfurizing tower, the utilization ratio of raising desulfurizing agent.
4) flue gas is removed most of dust through sack cleaner, and flue gas after being purified is discharged from exhanst gas outlet two through air-introduced machine.
5) from sack cleaner separate fully the ash particle that contains desulfurizing agent of reaction enter in the desulfurizing tower again, the bottom whitewashing mechanism of the multilayer whitewashing mechanism of awl column body segment recycles below one through the returning charge skewed slot.
Realize the device of the incorporate method of above-mentioned stack gas desulfurization and dust removal of circulating fluid bed in damp dry type, it comprises pre-separation chamber, desulfurizing tower and sack cleaner.Its design feature is that described desulfurizing tower is to be formed by connecting by direct tube section and awl column body segment.Awl column body segment bottom is connected with the pre-separation chamber by set changeover portion, and bottom, pre-separation chamber is provided with the conical bottom of band ash port, and the two-way side of pre-separation chamber is provided with the gas approach of tangential rotation intake method.Be provided with multilayer whitewashing mechanism in the awl column body segment, direct tube section is provided with exhanst gas outlet one and is connected with described sack cleaner.The inclined-plane is provided with the returning charge skewed slot at the bottom of the awl of sack cleaner, and returning charge skewed slot bottom interface is connected with desulfurizing tower and places below the bottom whitewashing mechanism.The top, side of sack cleaner is provided with exhanst gas outlet two.
In above-mentioned device, described changeover portion is built-in with five to nine siphunculus, and each siphunculus places among the tube bank, and tube bank is supported with the welding of changeover portion inwall.
In above-mentioned device, be provided with the two-layer whitewashing mechanism one and the whitewashing mechanism two that can spray into different desulfurizing agent flows in the described awl column body segment according to thermograde in the desulfurizing tower.
In above-mentioned device, the bottom interface of described returning charge skewed slot places bottom whitewashing mechanism 0.5～0.8m place, side once.The exhanst gas outlet one of desulfurizing tower is apart from the direct tube section inner top 0.8～1.2m of desulfurizing tower.
In above-mentioned device, described sack cleaner adopts sub-air chamber's control mode.
The present invention has the following advantages and useful effect compared with the prior art:
1. adopt two-way rotation intake method, under the condition that does not increase other pre-duster, realize the pre-separation of flying dust.Increase the ratio of unreacted desulfurizing agent in circulating ash, be implemented in the higher desulfuration efficiency of acquisition under the lower calcium sulfur ratio condition.The desulfurizing tower compact conformation has reduced equipment investment, is applicable in the big big-and-middle-sized coal fired power plant unit of exhaust gas volumn.
2. be provided with many siphunculus in the changeover portion, layout tangent to each other has been optimized the smoke distribution mode in the tower, has improved the adaptability of load.
3. the extended awl column body segment of desulfurizing tower, flue gas stream distributes comparatively even herein, makes that its smoke treatment amount is big, load adaptability good.
4. exhanst gas outlet one has certain distance with the top of desulfurizing tower direct tube section, fall after rise part particle that flue gas is carried secretly and bump back, direct tube section top, circulation in desulfurizing tower, forming, effectively improved the endocorpuscular concentration of desulfurizing tower, improve the utilization ratio of desulfurizing agent, reduced the load of sack cleaner.
5. sack cleaner has adopted sub-air chamber's control technology, and effectively the number of air chamber can be regulated according to flue gas load, makes load adaptability better.
6. the bottom interface of returning charge skewed slot is positioned at the below of bottom whitewashing mechanism one, can make the circulating ash elder generation fluidisation of the dry state humidification again that gets up, and has prevented that effectively the group of particle is sticking.
The present invention will be further described below in conjunction with accompanying drawing and concrete embodiment.
Description of drawings
Fig. 1 is the structural representation of apparatus of the present invention;
Fig. 2 is that the C-C of Fig. 1 is to structural representation;
Fig. 3 is that the A-A of Fig. 1 is to structural representation;
Fig. 4 is that the B-B of Fig. 1 is to structural representation.
The specific embodiment
Referring to Fig. 1 to Fig. 4, apparatus of the present invention comprise pre-separation chamber 10, desulfurizing tower 15 and sack cleaner 7.Desulfurizing tower 15 is to be formed by connecting by direct tube section 4 and awl column body segment 6, and awl column body segment 6 bottoms are connected with pre-separation chamber 10 by set changeover portion 9.Changeover portion 9 is built-in with five to nine siphunculus, and each siphunculus places among the tube bank 12, and tube bank 12 is supported with the welding of changeover portion 9 inwalls.10 bottoms, pre-separation chamber are provided with the conical bottom of band ash port 11, and its two-way side is provided with the gas approach 1 of tangential rotation intake method.Be provided with the two-layer whitewashing mechanisms 1 and the whitewashing mechanisms 23 that can spray into different desulfurizing agent flows in the awl column body segment 6 according to thermograde difference in the desulfurizing tower 15.Direct tube section 4 is provided with exhanst gas outlet 1 and is connected with the sack cleaner 7 that adopts sub-air chamber's control mode, and exhanst gas outlet 1 is apart from direct tube section 4 inner tops 0.8～1.2m.Inclined-plane 13 is provided with returning charge skewed slot 8 at the bottom of the awl of sack cleaner 7, and returning charge skewed slot 8 bottom interfaces are connected with desulfurizing tower 15 and place bottom whitewashing 0.5～0.8m place, mechanism one 2 belows.The top, side of sack cleaner 7 is provided with exhanst gas outlet 2 14.
Step during apparatus of the present invention operation is:
1) be divided into two-way from the flue gas of boiler emission behind trunk line and enter the pre-separation chamber 10 of desulfurizing tower 15 bottoms with two-way tangential rotation intake method, realize the pre-separation of flue gas buffering and flying dust, the fly ash granule after the separation can be through ash port 11 discharges.
2) flue gas enters the awl column body segment 6 of desulfurizing tower 15 by changeover portion 9, makes flue gas stream be evenly distributed in this section, with the desulfurizing agent generation chemical reaction of the different flow that uses whitewashing mechanism to spray into according to thermogrades in the desulfurizing tower 15, removes sulfur dioxide simultaneously.
3) circulation in unreacted desulfurizing agent and the flue gas of carrying fly ash granule secretly clash into, fall after rise and form in desulfurizing tower at direct tube section 4 tops of desulfurizing tower 15, the utilization ratio of raising desulfurizing agent.
4) flue gas is removed most of dust through sack cleaner 7, and flue gas after being purified is discharged from exhanst gas outlet 2 14 through air-introduced machine.
5) from sack cleaner 7 separate fully the ash particle that contains desulfurizing agent of reaction enter in the desulfurizing tower 15 again, the bottom whitewashing mechanism of the multilayers whitewashing mechanism of awl column body segment recycles below one 2 through returning charge skewed slot 8.
Claims (6)
1, the incorporate method of a kind of stack gas desulfurization and dust removal of circulating fluid bed in damp dry type, it comprises uses pre-separation chamber, desulfurizing tower and sack cleaner, the steps include:
1) be divided into two-way from the flue gas of boiler emission behind trunk line and enter the pre-separation chamber of desulfurizing tower bottom with two-way tangential rotation intake method, realize the pre-separation of flue gas buffering and flying dust, the fly ash granule after the separation is discharged through ash port;
2) flue gas enters the awl column body segment of desulfurizing tower by changeover portion, makes flue gas stream be evenly distributed at this awl column body segment, with the desulfurizing agent generation chemical reaction of the different flow that uses whitewashing mechanism to spray into according to thermograde in the desulfurizing tower, removes sulfur dioxide simultaneously;
3) circulation in unreacted desulfurizing agent and the flue gas of carrying fly ash granule secretly clash into, fall after rise and form in desulfurizing tower at the direct tube section top of desulfurizing tower, the utilization ratio of raising desulfurizing agent;
4) flue gas is removed most of dust through sack cleaner, and flue gas after being purified is discharged from exhanst gas outlet two through air-introduced machine;
5) from sack cleaner separate fully the ash particle that contains desulfurizing agent of reaction enter in the desulfurizing tower again, the bottom whitewashing mechanism of the multilayer whitewashing mechanism of awl column body segment recycles below one through the returning charge skewed slot.
2, realize the device of the incorporate method of the described stack gas desulfurization and dust removal of circulating fluid bed in damp dry type of claim 1, it comprises pre-separation chamber (10), desulfurizing tower (15) and sack cleaner (7), it is characterized in that, described desulfurizing tower (15) is to be formed by connecting by direct tube section (4) and awl column body segment (6), awl column body segment (6) bottom is connected with pre-separation chamber (10) by set changeover portion (9), bottom, pre-separation chamber (10) is provided with the conical bottom of band ash port (11), the two-way side of pre-separation chamber (10) is provided with the gas approach (1) of tangential rotation intake method, be provided with multilayer whitewashing mechanism in the awl column body segment (6), direct tube section (4) is provided with exhanst gas outlet one (5) and is connected with described sack cleaner (7), inclined-plane (13) are provided with returning charge skewed slot (8) at the bottom of the awl of sack cleaner (7), returning charge skewed slot (8) bottom interface is connected with desulfurizing tower (15) and places below the bottom whitewashing mechanism, and the top, side of sack cleaner (7) is provided with exhanst gas outlet two (14).
According to the described device of claim 2, it is characterized in that 3, described changeover portion (9) is built-in with five to nine siphunculus, each siphunculus places among the tube bank (12), and tube bank (12) is supported with the welding of changeover portion (9) inwall.
4, according to claim 2 or 3 described devices, it is characterized in that, be provided with the two-layer whitewashing mechanism one (2) and the whitewashing mechanism two (3) that can spray into different desulfurizing agent flows in the described awl column body segment (6) according to the interior thermograde of desulfurizing tower (15).
5, according to the described device of claim 4, it is characterized in that, the bottom interface of described returning charge skewed slot (8) places 0.5～0.8m place, bottom whitewashing mechanism one (2) below, exhanst gas outlet one (5) direct tube section apart from desulfurizing tower (15) (4) inner top 0.8～1.2m of desulfurizing tower (15).
According to the described device of claim 5, it is characterized in that 6, described sack cleaner (7) adopts sub-air chamber's control mode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101018526A CN100441271C (en) | 2004-12-29 | 2004-12-29 | Method and equipment for integrated stack gas desulfurization and dust removal of circulating fluid bed in damp dry type |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101018526A CN100441271C (en) | 2004-12-29 | 2004-12-29 | Method and equipment for integrated stack gas desulfurization and dust removal of circulating fluid bed in damp dry type |
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| CN1795967A CN1795967A (en) | 2006-07-05 |
| CN100441271C true CN100441271C (en) | 2008-12-10 |
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| CN105126460A (en) * | 2015-08-20 | 2015-12-09 | 中国石油大学(北京) | Desulphurization dedusting integrated half-dry type swirl desulfurization tower |
| CN105413437A (en) * | 2015-12-25 | 2016-03-23 | 北京建筑材料科学研究总院有限公司 | Flue gas desulfurization system for cement kiln |
| CN106582232A (en) * | 2017-02-08 | 2017-04-26 | 江苏佳鑫环保工程有限公司 | Synergistic removal tending to zero discharge purification process and equipment for multicomponent pollutants in flue gas |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2647417Y (en) * | 2003-10-15 | 2004-10-13 | 武汉凯迪电力股份有限公司 | Double-side variable speed multi-circulating fluidized flue gas desulfurization apparatus |
| CN2796812Y (en) * | 2004-12-29 | 2006-07-19 | 清华大学 | Integrated device of semidry circulation fluidized bed for exhaust gas desulfuring and dust removal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2647417Y (en) * | 2003-10-15 | 2004-10-13 | 武汉凯迪电力股份有限公司 | Double-side variable speed multi-circulating fluidized flue gas desulfurization apparatus |
| CN2796812Y (en) * | 2004-12-29 | 2006-07-19 | 清华大学 | Integrated device of semidry circulation fluidized bed for exhaust gas desulfuring and dust removal |
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Effective date of registration: 20080516 Address after: A, block 2901, Tongfang science and Technology Square, Beijing, 100083, China Applicant after: Tsinghua University Co-applicant after: Tongfang Environment Co., Ltd. Address before: A, block 2901, Tongfang science and Technology Square, Beijing, 100083, China Applicant before: Tsinghua University Co-applicant before: Tongfang Environment Co., Ltd. Co-applicant before: Tongfang Co., Ltd. |
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